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-rw-r--r--xpcom/threads/TimerThread.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/xpcom/threads/TimerThread.h b/xpcom/threads/TimerThread.h
new file mode 100644
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--- /dev/null
+++ b/xpcom/threads/TimerThread.h
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TimerThread_h___
+#define TimerThread_h___
+
+#include "nsIObserver.h"
+#include "nsIRunnable.h"
+#include "nsIThread.h"
+
+#include "nsTimerImpl.h"
+#include "nsThreadUtils.h"
+
+#include "nsTArray.h"
+
+#include "mozilla/Atomics.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Monitor.h"
+
+namespace mozilla {
+class TimeStamp;
+} // namespace mozilla
+
+class TimerThread final
+ : public nsIRunnable
+ , public nsIObserver
+{
+public:
+ typedef mozilla::Monitor Monitor;
+ typedef mozilla::TimeStamp TimeStamp;
+ typedef mozilla::TimeDuration TimeDuration;
+
+ TimerThread();
+ nsresult InitLocks();
+
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIRUNNABLE
+ NS_DECL_NSIOBSERVER
+
+ nsresult Init();
+ nsresult Shutdown();
+
+ nsresult AddTimer(nsTimerImpl* aTimer);
+ nsresult RemoveTimer(nsTimerImpl* aTimer);
+
+ void DoBeforeSleep();
+ void DoAfterSleep();
+
+ bool IsOnTimerThread() const
+ {
+ return mThread == NS_GetCurrentThread();
+ }
+
+private:
+ ~TimerThread();
+
+ mozilla::Atomic<bool> mInitInProgress;
+ bool mInitialized;
+
+ // These two internal helper methods must be called while mMonitor is held.
+ // AddTimerInternal returns the position where the timer was added in the
+ // list, or -1 if it failed.
+ int32_t AddTimerInternal(nsTimerImpl* aTimer);
+ bool RemoveTimerInternal(nsTimerImpl* aTimer);
+ void ReleaseTimerInternal(nsTimerImpl* aTimer);
+
+ already_AddRefed<nsTimerImpl> PostTimerEvent(already_AddRefed<nsTimerImpl> aTimerRef);
+
+ nsCOMPtr<nsIThread> mThread;
+ Monitor mMonitor;
+
+ bool mShutdown;
+ bool mWaiting;
+ bool mNotified;
+ bool mSleeping;
+
+ nsTArray<nsTimerImpl*> mTimers;
+};
+
+struct TimerAdditionComparator
+{
+ TimerAdditionComparator(const mozilla::TimeStamp& aNow,
+ nsTimerImpl* aTimerToInsert) :
+ now(aNow)
+#ifdef DEBUG
+ , timerToInsert(aTimerToInsert)
+#endif
+ {
+ }
+
+ bool LessThan(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
+ {
+ MOZ_ASSERT(aNewTimer == timerToInsert, "Unexpected timer ordering");
+
+ // Skip any overdue timers.
+ return aFromArray->mTimeout <= now ||
+ aFromArray->mTimeout <= aNewTimer->mTimeout;
+ }
+
+ bool Equals(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
+ {
+ return false;
+ }
+
+private:
+ const mozilla::TimeStamp& now;
+#ifdef DEBUG
+ const nsTimerImpl* const timerToInsert;
+#endif
+};
+
+#endif /* TimerThread_h___ */